© 2012 Fairchild Semiconductor Corporation
2
FEBFL7701_L31H008A • Rev.1.0.2
Table of Contents
1.
Introduction ............................................................................................................................... 3
1.1.
General Description ........................................................................................................ 3
1.2.
Features .......................................................................................................................... 3
2.
General Specifications for Evaluation Board ........................................................................... 5
3.
Photographs of the Evaluation Board ....................................................................................... 6
4.
Printed Circuit Board ................................................................................................................ 7
5.
Schematic .................................................................................................................................. 8
6.
Bill of Materials ........................................................................................................................ 9
7.
Inductor Design ....................................................................................................................... 10
8.
Performance of Evaluation Board ........................................................................................... 11
8.1.
Typical Waveforms: Startup ........................................................................................ 12
8.2.
Operating Frequency & Minimum Duty ...................................................................... 13
8.3.
Typical Waveforms: Steady State ................................................................................ 14
8.4.
Typical Waveforms: Abnormal Mode (LED Open) .................................................... 16
8.5.
Typical Waveforms: Abnormal Mode (Inductor Short) .............................................. 17
8.6.
System Efficiency ........................................................................................................ 18
8.7.
Power Factor at Rated Load Condition ........................................................................ 19
8.8.
THD Performance ........................................................................................................ 20
8.9.
Thermal Performance ................................................................................................... 21
8.10.
EMI Test Results .......................................................................................................... 23
9.
Revision History ..................................................................................................................... 24
